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Excitation energies metal shielding

When tin is bonded to transition metals, large Sn chemical shift ranges have been found that cannot be explained in terms of simple inductive and coordination number effects. The shielding could be interpreted in terms of d j-d overlap and the effect on the average excitation energy. [Pg.710]

The Stephens and Buckingham theory shows that the paramagnetic shielding term (ap) is dependent on AE (the energy separation of the ground and excited states), Rh (the metal-hydrogen intemuclear distance), and k, the exponent of the d orbitals. The latter was taken to be constant over any particular row of transition metals. [Pg.132]

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Excitation energy

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